20mm steel bolt carrier for Tokyo Marui MWS M4 GBB(2023 spec)

20mm x 52mm cylinder (19mm x 52mm original)

Steel CNC bolt carrier, 7075T6  loading nozzle, Brass end cap

Plug & play. No need to install knocker lock

150% recoil compare to other steel bolt carriers for TM MWS

380fps cylinder bulb